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