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