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