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