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