First, how you display your experience on youre resume might depend on how long you have been out of university or how many years of experience you have. If you are in school or have recently graduated, it is normally best to put your educational experience first. If you studied Human Resources I would definitely mention that with your educational experience to demonstrate to the employer that you have learned about the field and might know more about what makes an effective Human Resources administrator than someone who never studied it.
If you have any work experience in the field, be sure to list all relevant jobs on your resume, starting with your current or most recent job and work in a reverse choronological order (newest to oldest). Be sure to list what you were responsible for at each job and any contributions you made that improved the company or make you stand out as an exceptional employee. Try to give specific examples such as if you improved a system for employees to have access to information, or anything else you may have done.