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)(11,15)(12,14)(13,16)(17,18,21,22)(19,20,23,24)(26,30)(27,32)(2,6)(4,7)(9,10,12,14)(11,15,16,13)(17,18)(19,20)(21,22)(23,24)(25,26,29,30)(27,31,32,28)(2,6)(4,7)(11,16)(13,15)(18,22)(20,24)(25,27)(26,31)(28,30)(29,32) involution — undirected(1,3)(2,7)(4,6)(5,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,20)(21,23)(22,24)(25,27)(26,31)(28,30)(29,32) involution — undirected(1,4,5,7)(2,8,6,3)(9,11,12,16)(10,13,14,15)(17,20)(18,23)(19,22)(21,24)(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.