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