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