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