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