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