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