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