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