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