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)(19,22)(20,28)(21,25)(23,27)(24,31)(26,29)(30,32)(1,3,4,8)(2,5,6,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,18)(20,24,30,26)(21,25,23,27)(28,29,32,31)(3,8)(5,7)(9,11)(10,13)(12,16)(14,15)(17,20,21,29,22,30,23,31)(18,24,27,32,19,26,25,28)(2,6)(5,7)(11,16)(13,15)(18,19)(24,26)(25,27)(28,32) involution — undirected(10,14)(13,15)(17,21,22,23)(18,25,19,27)(20,29,30,31)(24,28,26,32)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.