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