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