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