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