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