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