I would not wait till Monday. Call today.
Hey, this is Eric, the guy you thought would be a good fit for a Service Writer position. I really appreciate the time you took meeting and interviewing me Tuesday. Especially knowing I was not a fit for the sale position you were looking for. I just wanted to follow up and see if you had passed my information along to the General Manager and seeing if there was any way I might be able to come in and meet with him on Tuesday? I understand if there is not an opening now, but I would really like to touch base with him and introduce myself. As you know from meeting with me, I'm pretty excited for the opportunity to work with your company.
I say meet with him on Tuesdays, because Mondays are always recovery from the weekend work to catch up ,and for people to get their head in the game.
Good luck