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