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