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