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