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