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)(11,15)(12,16)(13,14)(17,18)(19,24)(20,21)(22,23)(25,26,31,29)(27,32,30,28)(1,3)(2,6)(4,8)(5,7)(9,11)(10,12)(13,15)(14,16)(18,23)(19,20)(25,27,31,30)(26,32,29,28)(3,7)(4,6)(10,13)(11,16)(17,19,22,20)(18,24,23,21)(25,28)(26,30)(27,29)(31,32)(1,2)(3,4)(5,8)(6,7)(9,12)(10,11)(13,16)(14,15)(17,20,22,19)(18,21,23,24)(25,29,31,26)(27,32,30,28)(1,4)(2,7)(3,8)(5,6)(9,13,14,10)(11,15,16,12)(17,21)(18,20)(19,23)(22,24)(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.