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