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