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