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