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