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