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