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