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)(19,22)(20,23)(21,24)(25,32)(26,30)(27,29)(28,31) involution — undirected(1,3,4,8)(2,5,6,7)(10,14)(13,16)(17,19,21,27,20,26,28,25)(18,22,24,29,23,30,31,32)(9,10,11,13,12,14,15,16)(18,23)(19,25)(21,28)(22,29)(26,27)(30,32)(2,6)(5,7)(10,14)(13,16)(19,26)(22,30)(25,27)(29,32) 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.