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