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