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