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