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