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