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