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