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