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