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