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