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