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)(17,18,22,27)(19,28,23,24)(20,21,30,32)(25,31,29,26)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,30)(22,23)(25,29)(27,28) involution — undirected(1,3,5,4)(2,7,6,8)(17,20,19,26,22,30,23,31)(18,25,24,21,27,29,28,32)(11,15)(13,16)(17,21,19,29,22,32,23,25)(18,26,24,30,27,31,28,20)(1,4,5,3)(2,7,6,8)(18,27)(21,32)(24,28)(25,29)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.