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