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