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