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