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