Does service in the White House Communications Agency look good on a civilian resume? Will it attract employers and lead to a higher salary?

Resumes don't get you jobs. Resumes get you interviews. Interviews get you the job.

Will having the WHCA on your resume get you a job and/or higher salary? Probably not. While it's possible there is an employer that would hire you just because you worked at the WHCA, everyone else won't (an exception might be if you were bringing an extensive 'rolodex' to a business development position as many former senior military leaders do).

Elaborating on the requirements of the job, what functions you were in charge of, unique skills learned, etc. Those are things on a resume that would increase the likelihood of getting an interview.

Saying that you were (hypothetically) responsible to ensure the logistical support to a no-fail worldwide communications mission and elaborating on the specific requirements and notable success of your work experience will probably make no difference to a recruiter if the job was at the WHCA or Verizon.

It won't hurt you but try to align WHCA responsibilities with the civilian position you're applying for.

To copy COL Randall Cudworth, "Resumes don't get you jobs. Resumes get you interviews. Interviews get you the job." However, I would caveat the rest of COL Cudworth's comment to say... It depends on the prospective employer. Post military, I've been worked as a Government contractor for the last 18 years, and when I interview, prior government service and agencies are one of the things I take note of. As I interview, I very rarely interview for A position... Typically, I'm interviewing for a couple of positions, but I'm also interviewing with an eye for the future - for the candidate as well as my company. If I can make an immediate placement, great. But if this candidate "shows" his or her ability for upwards mobility, I make note of that, and push the new employee to do more, take on more, and help them move up. Depending on the duties @ WHCA, depends on my thoughts/reactions/planning!