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