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