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