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