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