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