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