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