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