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