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