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