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