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