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