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)(17,18,20,24,21,23,29,31)(19,25,27,30,26,32,28,22)(2,5)(6,7)(9,11,14,16,13,10,12,15)(19,26)(22,30)(25,32)(27,28)(9,11,13,10)(12,16,14,15)(17,19,21,26)(18,22,23,30)(20,28,29,27)(24,32,31,25)(1,3,4,8)(2,6,5,7)(9,12,13,14)(10,15,11,16)(18,23)(22,30)(24,31)(25,32)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.