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