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