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