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)(17,18,23,27)(19,28,30,24)(20,25,31,22)(21,32,29,26)(1,3,5,4)(2,6,8,7)(11,15)(13,16)(17,19)(18,24)(20,29)(21,31)(22,26)(23,30)(25,32)(27,28)(1,3)(2,7)(4,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,20,23,31)(18,25,27,22)(19,29,30,21)(24,32,28,26)(3,4)(6,7)(17,21,23,29)(18,26,27,32)(19,20,30,31)(22,24,25,28)(1,4,5,3)(2,7,8,6)(9,11,12,15)(10,13,14,16)(17,20)(18,25)(19,21)(22,27)(23,31)(24,26)(28,32)(29,30)(1,2)(3,6)(4,7)(5,8)(9,10)(11,13)(12,14)(15,16)(17,22,23,25)(18,20,27,31)(19,26,30,32)(21,24,29,28)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.