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