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