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