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