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