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