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