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)(17,18,22,31,21,25,20,24)(19,26,27,23,30,28,29,32)(1,3,4,7)(2,5,6,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,23)(20,27)(21,30)(22,29)(24,28)(25,32)(26,31)(2,6)(5,8)(9,11)(10,13)(12,16)(14,15)(17,20,21,22)(18,24,25,31)(19,27,30,29)(23,28,32,26)(11,16)(13,15)(17,18,20,24,21,25,22,31)(19,28,29,23,30,26,27,32)(10,14)(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.