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) involution — undirected(1,3,5,4)(2,6,8,7)(9,11,14,10)(12,15,13,16)(17,18)(19,27)(20,25)(21,30)(22,31)(23,26)(24,28)(29,32)(1,3,5,4)(2,7,8,6)(9,12,14,13)(10,15,11,16)(17,19,23,21)(18,24,26,32)(20,28,22,29)(25,30,31,27)(9,13,14,12)(10,15,11,16)(17,20,23,22)(18,25,26,31)(19,28,21,29)(24,30,32,27)(1,4,5,3)(2,7,8,6)(17,21,23,19)(18,24,26,32)(20,29,22,28)(25,30,31,27)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.