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)(20,27)(22,29)(24,30)(26,31)(28,32)(1,3)(2,5)(4,8)(6,7)(9,11,13,16)(10,14,12,15)(17,18)(19,26)(20,24)(21,23)(22,28)(25,31)(27,30)(29,32)(9,10,13,12)(11,15,16,14)(17,19,27,32,21,28,20,25)(18,22,30,31,23,26,24,29)(2,6)(5,7)(17,18)(19,22)(20,24)(21,23)(25,29)(26,28)(27,30)(31,32) involution — undirected(3,8)(5,7)(9,12,13,10)(11,14,16,15)(18,23)(22,26)(24,30)(29,31)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.