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