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