Im up grading a100amp electric on a trailer ,and I need to know what a the grounding system shoud look like, diagram

There is no diagram for something like this.

A mobile home panel MUST be fed by a 4-wire feeder from the service equipment on the pole/pedestal.
The grounds and neutral are kept separate in the panel.
The trailer frame must be bonded to the panel ground. Typically #8cu for a 100A panel.
NO ground rod is used at the trailer itself.