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