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