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