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