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