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