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)(21,22,26,29)(23,27,31,34)(24,33,28,25)(30,36,35,32)(2,4)(5,7)(6,10)(8,14)(9,13)(11,17)(12,16)(15,19)(18,20)(21,23)(22,27)(24,30)(25,32)(26,31)(28,35)(29,34)(33,36) involution — undirected(7,13)(8,15)(10,16)(11,18)(21,24,25,22,26,28,33,29)(23,30,32,27,31,35,36,34)(5,8,9,15)(6,11,12,18)(7,14,13,19)(10,17,16,20)(23,31)(27,34)(30,35)(32,36)(7,13)(10,16)(14,19)(17,20) 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.