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