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