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