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