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