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