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