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