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