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