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