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