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