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