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