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