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