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