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)(17,18,21,20)(19,23,26,28)(22,24,30,29)(25,32,27,31)(2,5)(3,7)(9,11,13,12)(10,14,15,16)(17,19)(18,23)(20,28)(21,26)(22,25)(24,32)(27,30)(29,31)(9,12,13,11)(10,14,15,16)(18,20)(19,25)(22,30)(23,31)(26,27)(28,32)(2,5)(6,8)(17,20,21,18)(19,23,26,28)(22,29,30,24)(25,32,27,31)(1,3,4,7)(2,6,5,8)(19,25)(22,30)(23,32)(24,29)(26,27)(28,31)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.