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