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