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