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