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