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