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