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