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)(19,26)(21,27)(24,28)(25,30)(31,32)(9,10)(11,15)(12,14)(13,16)(17,18,22,25)(19,24,26,32)(20,28,29,31)(21,30,27,23)(1,3,5,4)(2,6,7,8)(9,11,12,16)(10,13,14,15)(17,19)(18,24)(20,21)(22,26)(23,31)(25,32)(27,29)(28,30)(11,16)(13,15)(17,20,22,29)(18,24,25,32)(19,27,26,21)(23,28,30,31)(1,4,5,3)(2,6,7,8)(10,14)(13,15)(18,25)(23,30)(24,32)(28,31)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.