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