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