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