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