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