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