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