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)(24,25)(26,30)(31,32)(1,2)(3,6)(4,7)(5,8)(11,16)(12,15)(17,18)(19,24)(20,25)(21,26)(22,23)(27,31)(28,32)(29,30) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11)(10,12)(13,16)(14,15)(17,19,22,20)(18,24,23,25)(21,27,29,28)(26,31,30,32)(9,12)(10,11)(13,15)(14,16)(17,18)(19,24)(20,25)(21,26)(22,23)(27,31)(28,32)(29,30) involution — undirected(1,3)(2,6)(4,8)(5,7)(17,20,22,19)(18,25,23,24)(21,27,29,28)(26,31,30,32)(1,2)(3,5)(4,7)(6,8)(17,21,22,29)(18,26,23,30)(19,27,20,28)(24,31,25,32)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.