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