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