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