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