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