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