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