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