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