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