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