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