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