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