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