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