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