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