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