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