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