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)(19,20)(21,24)(22,25)(23,26)(27,28)(29,31)(30,32) involution — undirected(1,2)(3,6)(4,7)(5,8)(9,11,13,12)(10,14,15,16)(17,19,24,22)(18,25,21,20)(23,27,31,30)(26,32,29,28)(1,3)(2,5)(4,8)(6,7)(17,20)(18,22)(19,21)(23,28)(24,25)(26,30)(27,29)(31,32) involution — undirected(9,11,13,12)(10,14,15,16)(17,21,24,18)(19,25,22,20)(23,29,31,26)(27,32,30,28)(1,3)(2,6)(4,8)(5,7)(9,10)(11,14)(12,16)(13,15)(17,22,24,19)(18,25,21,20)(23,27,31,30)(26,28,29,32)(1,2)(3,5)(4,7)(6,8)(9,12,13,11)(10,14,15,16)(17,23,24,31)(18,26,21,29)(19,27,22,30)(20,28,25,32)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.