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