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