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