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