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