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