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