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