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