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