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