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