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