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