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