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