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