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