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