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