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