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