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