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