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