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