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