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