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)(13,14,18,17)(15,20,16,19)(21,22,26,29)(23,24,31,27)(25,33,35,28)(30,36,34,32)(8,12)(10,11)(13,14)(15,19)(16,20)(17,18)(21,23,26,31)(22,27,29,24)(25,34,35,30)(28,32,33,36)(6,7)(10,11)(13,15,18,16)(14,19,17,20)(21,23)(22,27)(24,29)(25,34)(26,31)(28,32)(30,35)(33,36)(1,2)(3,4)(5,7,9,6)(8,11,12,10)(13,16,18,15)(14,19,17,20)(21,24,26,27)(22,23,29,31)(25,32,35,36)(28,30,33,34)(5,8)(6,10)(7,11)(9,12)(13,17,18,14)(15,19,16,20)(21,25,26,35)(22,28,29,33)(23,30,31,34)(24,32,27,36)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.