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