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