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