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