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