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