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