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