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