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