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)(17,18,23,28,24,20,22,27)(19,21,26,25,31,32,30,29)(1,2,4,12,5,8,13,6)(3,10,11,7,9,14,16,15)(17,19)(18,25)(20,29)(21,28)(22,26)(23,30)(24,31)(27,32)(3,9)(7,15)(10,14)(11,16)(17,20)(18,24)(19,29)(21,26)(22,28)(23,27)(25,31)(30,32) involution — undirected(1,3,4,11,5,9,13,16)(2,7,6,10,8,15,12,14)(17,21,22,29,24,32,23,25)(18,26,27,19,20,30,28,31)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.