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