To find the comet, look in the western horizon about an hour to 75 minutes after sunset -- which would be around 8:30 p.m.-ish. It should be up and to the right of the spot where the sun actually set on the horizon. EarthSky.org has this handy chart to locate it.
It's hard to spot with the naked eye so binoculars would help.
We've already passed its peak viewing opportunities and the comet will fade a little more each day as it moves up the horizon. Also, the moon is in the general area and will be getting brighter as it's in its waxing phase (half moon as of Tuesday.)
But if you missed Pan-STARRS, don't forget, this is just our "practice" comet -- the big show with Comet ISON is still due for this autumn and predictions are it'll really dazzle, perhaps so bright it'll be visible in daylight.