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