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