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