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