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