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