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