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