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