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