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