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