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