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