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