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