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