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