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