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