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