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