One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,9,12,10,8,16,18)(7,13,14,17,15,20,19,11)(22,27)(23,31)(29,30)(33,34)(5,7,10,15)(6,11,8,17)(9,19,16,14)(12,20,18,13)(21,22,25,27)(23,32,31,36)(24,30,26,29)(28,34,35,33)(2,4)(21,23,25,31)(22,28,27,35)(24,33,26,34)(29,32,30,36)(2,4)(5,8,10,6)(7,13,15,20)(9,12,16,18)(11,19,17,14)(21,24,25,26)(22,29,27,30)(23,33,31,34)(28,32,35,36)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.