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