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