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