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