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