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)(17,18,23,25,22,26,20,30)(19,27,29,21,28,24,31,32)(1,3,4,7)(2,5,6,8)(10,13)(11,15)(17,19)(18,24)(20,31)(21,30)(22,28)(23,29)(25,32)(26,27)(2,6)(5,8)(19,28)(21,32)(24,27)(29,31) involution — undirected(9,11,12,15)(10,14,13,16)(17,20,22,23)(18,25,26,30)(19,29,28,31)(21,27,32,24)(10,13)(14,16)(17,21,20,27,22,32,23,24)(18,19,30,31,26,28,25,29)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.