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