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