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