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