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