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