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