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