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