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