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