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