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