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