One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,9,12)(7,13,14,20)(8,16,17,11)(10,18,19,15)(21,22)(23,30)(24,32)(25,28)(26,35)(27,31)(29,34)(33,36)(1,2,4,3)(21,23,25,31)(22,27,28,30)(24,26,33,34)(29,36,35,32)(5,7,8,15,9,14,17,18)(6,10,11,13,12,19,16,20)(21,24,26,31,25,33,34,23)(22,27,29,32,28,30,35,36)(1,3,4,2)(7,14)(10,19)(13,20)(15,18)(22,28)(27,30)(29,35)(32,36)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.