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