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