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