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