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