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