One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10,12,15)(11,14,16,13)(17,18)(19,29)(20,31)(21,26)(22,27)(23,28)(24,32)(25,30)(1,3,4,8)(2,5,6,7)(9,11)(10,13)(12,16)(14,15)(17,19,23,30)(18,25,28,29)(20,22,21,24)(26,27,31,32)(11,16)(13,14)(17,20)(18,25)(19,24)(21,23)(22,30)(26,27)(28,29)(31,32) involution — undirected(9,11)(10,14)(12,16)(13,15)(17,21,23,20)(18,26,28,31)(19,22,30,24)(25,32,29,27)(11,16)(13,14)(17,22,23,24)(18,27,28,32)(19,20,30,21)(25,26,29,31)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.