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