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