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