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