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