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