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