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