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