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