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