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