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