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