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