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