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