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