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