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)(5,7,9,15)(6,10,12,13)(8,14,17,20)(11,18,16,19)(21,22,26,29)(23,30,32,35)(24,28,25,33)(27,34,36,31)(2,4)(21,23)(22,27)(24,31)(25,34)(26,32)(28,35)(29,36)(30,33) involution — undirected(5,8,9,17)(6,11,12,16)(7,14,15,20)(10,18,13,19)(21,24,26,25)(22,28,29,33)(23,31,32,34)(27,35,36,30)(7,15)(10,13)(14,20)(18,19)(22,28)(24,25)(27,35)(29,33)(30,36)(31,34) 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.