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