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