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