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