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