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