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