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