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