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