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