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