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