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