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