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