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