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)(21,22,26,31)(23,33,24,28)(25,32,27,30)(29,34,36,35)(1,2,4,3)(5,7)(6,10)(8,15)(9,13)(11,19)(12,17)(14,16)(18,20)(21,23)(22,28)(24,26)(25,35)(27,34)(29,30)(31,33)(32,36)(1,3,4,2)(7,13)(10,17)(14,15)(18,19)(21,24,26,23)(22,29,31,36)(25,35,27,34)(28,32,33,30)(5,8,9,16)(6,11,12,20)(7,14,13,15)(10,18,17,19)(6,12)(10,17)(11,20)(18,19)(21,25,26,27)(22,30,31,32)(23,34,24,35)(28,36,33,29)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.