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