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