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