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