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