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