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