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