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