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