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