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