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