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