Similar with some of the other comments, if you are going to go through the coursework definitely take the step to list it on your resume. For your first few years out of school (or your first job after graduation), it can be a good way to set you apart from your classmates. I recommend selecting a minor in an area that has broad application (such as a language, or skill) that you have interest in or a passion for. Communications definitely fits that, so congrats on already taking an important step!
The best way to have a minor help is to demonstrate why it was important to you. For example, I had a minor in a specific language because when I was in college I aspired to have a role that required me to speak multiple languages. People will be able to feel your passion and it makes you a more memorable job candidate.