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