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