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