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