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