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