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