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