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