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