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