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