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