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