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