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