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