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