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