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