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