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