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