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