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