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