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