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