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)(17,18,23,27)(19,28,31,32)(20,25,24,30)(21,26,22,29)(1,2,6,3)(4,7,5,8)(9,11,12,16)(10,13,14,15)(1,3,6,2)(4,7,5,8)(11,16)(13,15)(17,19,22,25,23,31,21,30)(18,24,26,28,27,20,29,32)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,20)(18,25)(19,29)(21,28)(22,32)(23,24)(26,31)(27,30)(1,5,6,4)(2,7,3,8)(17,21,23,22)(18,26,27,29)(19,30,31,25)(20,32,24,28)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.