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