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