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