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