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