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