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