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