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