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