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)(17,18,21,25,20,24,29,23)(19,26,28,31,27,22,30,32)(1,3,5,4)(2,6,7,8)(9,11,13,10)(12,15,16,14)(17,19,20,27)(18,22,24,26)(21,28,29,30)(23,31,25,32)(10,11)(14,15)(18,23)(21,29)(22,31)(24,25)(26,32)(28,30) involution — undirected(1,4,5,3)(2,6,7,8)(12,16)(14,15)(9,12,13,16)(10,14,11,15)(18,24)(19,27)(23,25)(28,30)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.