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