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