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