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