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