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