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)(17,18,23,24,22,26,21,20)(19,25,29,28,27,32,30,31)(1,3,4,8)(2,5,6,7)(9,10)(11,15)(12,14)(13,16)(18,24)(19,27)(20,26)(21,23)(25,31)(28,32)(2,6)(5,7)(9,11,12,16)(10,13,14,15)(17,19,22,27)(18,25,26,32)(20,31,24,28)(21,30,23,29)(3,8)(5,7)(11,16)(13,15)(17,20,23,18,22,24,21,26)(19,28,29,32,27,31,30,25)(10,14)(13,15)(17,21,22,23)(18,20,26,24)(19,29,27,30)(25,28,32,31)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.