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