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