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