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