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