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