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