Rangsit to Rayong or Kasetsert Sriracha

I have a 3 days work in Rayong and I have to go on Monday, Tuesday, Wednesday. I am finding the transportation path which is the earliest as possible on Monday morning to go there, I have rent a room already in Sriracha but I don’t want to stay there for real, so I just want to go to work on Monday morning around 4 or 5 am in Monday morning. Please help me find the transportation, I don’t know how to get there in early morning.