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