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