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