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