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