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