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