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