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