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