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