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