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