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