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