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