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