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