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