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