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)(11,16)(12,14)(13,15)(18,22)(20,24)(25,26)(27,29)(28,30)(31,32) involution — undirected(2,6)(3,8)(9,11,14,13)(10,15,12,16)(17,18)(19,20)(21,22)(23,24)(25,27,30,32)(26,31,28,29)(2,6)(3,8)(10,12)(15,16)(18,22)(19,23)(26,28)(27,32) involution — undirected(1,3,5,8)(2,7,6,4)(9,12,14,10)(11,15,13,16)(17,19)(18,20)(21,23)(22,24)(25,28,30,26)(27,31,32,29)(1,4,5,7)(2,8,6,3)(9,13,14,11)(10,15,12,16)(17,20)(18,19)(21,24)(22,23)(25,29,30,31)(26,32,28,27)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.