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)(7,17,20,13,21,22,28,18)(9,23,27,32,26,31,25,14)(19,33,24,30,34,29,36,35)(5,7,12,20,11,21,10,28)(6,13,8,22,16,18,15,17)(9,24,27,34,26,36,25,19)(14,30,23,29,32,35,31,33)(5,8,10,16,11,15,12,6)(7,18,20,22,21,13,28,17)(9,23,25,32,26,31,27,14)(19,33,24,35,34,29,36,30)(2,4)(5,9,10,25,11,26,12,27)(6,14,8,23,16,32,15,31)(7,19,20,24,21,34,28,36)(13,29,17,30,18,33,22,35)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.