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