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