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