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