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