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