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