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