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