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