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