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