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