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