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