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