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