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