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