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