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