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