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