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