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