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