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