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