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