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