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