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