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