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