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)(11,14)(12,13)(15,16)(17,18,23,22)(19,24,26,21)(20,25,29,30)(27,31,32,28)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,26)(18,24,22,21)(20,27,29,32)(25,31,30,28)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,23,29)(18,25,22,30)(19,27,26,32)(21,28,24,31)(10,13)(14,16)(17,21,22,19,23,24,18,26)(20,28,30,27,29,31,25,32)(1,4,5,3)(2,7,6,8)(9,11,12,15)(10,14,13,16)(20,29)(25,30)(27,32)(28,31)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.