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