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