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