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