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