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