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