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