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