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