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