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