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