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