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