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