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