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