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