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