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