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