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