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