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