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