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