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