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