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