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