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