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