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