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