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