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