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