There isn't a wiring diagram for these. There is only a switch, a motor and a light, so a schematic isn't really required.
I'm assuming you've made the fatal mistake of removing the wiring from the old switch and have forgotten where to re-connect them. It's also not very helpful that all the wires are white, so I can't really tell you to connect red to "x", black to "y", etc.
The really important connections are the power cord and the motor brush connections. You can't get the power cord wrong as the plug is shaped to only allow connection at one orientation: I've drawn you a diagram to show 3 of the 4 connections:
As long as the motor brushes are correct, there wont be any problem. If these are the wrong way around, the motor will run in reverse and will blow instead of s/uck.
The headlight can be wired either way around so if these connections are switched, it shouldn't matter. You have a 50/50 chance of getting it back the same way as it was originally and if there is any problem with the light, you can easily switch these wires over.
Hope this helps. Please post back if you need further assistance.