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