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