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