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