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