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