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