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