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