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