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