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