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