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