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)(17,18,21,26,22,27,19,23)(20,30,28,32,31,25,29,24)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,21)(18,23,27,26)(20,29,31,28)(24,25,32,30)(9,11)(10,13)(12,16)(14,15)(17,20,22,31)(18,24,27,32)(19,28,21,29)(23,30,26,25)(3,8)(5,7)(11,16)(13,15)(17,20)(18,25)(19,29)(21,28)(22,31)(23,32)(24,26)(27,30) involution — undirected(10,14)(13,15)(17,19,22,21)(18,26,27,23)(20,28,31,29)(24,25,32,30)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.