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