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)(21,22,24,27)(23,31,32,36)(25,30,26,29)(28,34,35,33)(1,2,3,4)(22,27)(28,35)(29,30)(31,36)(5,7,9,15)(6,10,12,19)(8,17,18,14)(11,20,16,13)(21,23,24,32)(22,28,27,35)(25,34,26,33)(29,36,30,31)(22,29)(25,26)(27,30)(28,36)(31,35)(33,34) 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.