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