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