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