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