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