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