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