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