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