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