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