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)(24,32)(25,27)(26,29)(28,33)(31,35)(34,36)(13,14)(15,20)(16,17)(18,19)(21,23,26,25)(22,27,29,30)(24,31,33,34)(28,35,32,36)(1,2)(3,4)(13,14,16,17)(15,18,19,20)(21,24)(22,28)(23,31)(25,34)(26,33)(27,35)(29,32)(30,36)(5,6,8,9)(7,10,11,12)(13,14)(15,18)(16,17)(19,20)(21,25,26,23)(22,27,29,30)(24,31,33,34)(28,36,32,35)(5,7,8,11)(6,10,9,12)(13,15,16,19)(14,18,17,20)(21,22)(23,30)(24,28)(25,27)(26,29)(31,36)(32,33)(34,35)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.