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