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