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