The long time answers are "shower when you get to work/at a gym nearby" and "shower before you leave, ride easy, clean up with baby wipes in the handicap stall of the restroom."
If you have the office that should go with the suit, you can leave a suit or two hanging on the back of your office door.
I leave a pair of dress shoes under my cube desk, and bring khakis and a dress shirt every day.