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