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