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