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