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