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