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