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