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