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