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