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