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