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