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