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