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