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