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)(11,15)(12,13)(14,16)(17,18)(19,22)(20,29)(21,25)(23,27)(24,28)(26,31)(30,32) involution — undirected(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,24,27)(18,22,28,23)(20,25,31,32)(21,26,30,29)(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,23,21,24,31,22,30)(18,25,19,29,28,32,27,26)(9,11,12,16)(10,14,13,15)(17,21,23,31,24,30,22,20)(18,26,19,25,28,29,27,32)(1,4,5,3)(2,7,6,8)(17,22,24,23)(18,19,28,27)(20,30,31,21)(25,29,32,26)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.