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