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