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