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